1
Mamoru Sawahashi, Fumiyuki Adachi: Transmission power control method and a transmission power control apparatus. NTT Mobile Communications Network, Rogers & Wells, December 31, 1996: US05590409 (186 worldwide citation)

A transmission power control method of a mobile station in a CDMA (Code Division Multiple Access) system which primarily controls transmission power of the mobile station by using a closed loop control which enables high accuracy power control. When the received power at the base station of a signal ...


2
Motoshi Tamura, Mutsumaru Miki, Akiko Okamoto, Kenya Kusunose, Akihiro Uchikoshi, Daisuke Igarashi, Katsuhiko Yamagata, Takaaki Sato, Junichiro Hagiwara, Yasuyuki Watanabe, Takuya Hamajima, Masafumi Hata, Nobutaka Ishikawa, Yoshiyuki Yasuda, Kazufumi Yunoki, Nobuhide Uchiyama: Method and system for mobile communications. NTT Mobile Communications Network, Brinks Hofer Gilson & Lione, May 22, 2012: US08185158 (153 worldwide citation)

When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary ...


3
Taisuke Ihara, Koichi Tsunekawa, Makoto Kijima: Broadband antenna using a semicircular radiator. NTT Mobile Communications Network, Pollock Vande Sande & Amernick, February 16, 1999: US05872546 (108 worldwide citation)

In a broadband antenna using a semicircular conductor disc, a semicircular cutout is formed in the semicircular radiator concentrically therewith. Alternatively, a semicircular arcwise radiating conductor with a semicircular cutout defined concentrically therewith is bent into a cylindrical shape to ...


4
Hitoshi Yoshino, Kazuhiko Fukawa, Hiroshi Suzuki: Interference signal cancelling method, receiver and communication system using the same. NTT Mobile Communications Network, Pollock Vande Sande & Priddy, July 16, 1996: US05537443 (105 worldwide citation)

Pluralities of estimated desired and interference signal sequence candidates corresponding to the states of transition of desired and interference signals estimated to receive are sequentially generated in a state estimation part 40, from which they are provided to a desired signal estimation part 1 ...


5
Mamoru Sawahashi, Hidehiro Andou, Yoshinori Miki, Kenichi Higuchi: CDMA demodulating apparatus. NTT Mobile Communications Network, Brown Raysman Millstein Felder & Steiner, October 24, 2000: US06137788 (98 worldwide citation)

A CDMA demodulating apparatus with an improved interference canceling effect when there are a large number of communicators. A reception signal having a frame configuration in which a pilot signal of a known pattern is inserted between information signals is received from a plurality of communicator ...


6
Katsumi Takahashi, Yoshinori Uchida: Private mobile communication system easily connecting portable or mobile radio telephone equipment to public network. NTT Mobile Communications Network, Mitsubishi Denki Kabushiki Kaisha, Rothwell Figg Ernst & Kurz, February 9, 1999: US05870677 (91 worldwide citation)

A private mobile communication system serves to support communication between mutual portable or mobile radio telephone equipment which are registered in the system, and communication between the portable or mobile radio telephone equipment and a telephone connected to a public network. A portable o ...


7
Youichi Douzono, Narumi Umeda: Base station device and mobile station device in mobile communication system utilizing the site diversity effect in soft handover state. NTT Mobile Communications Network, Oblon Spivak McClelland Maier & Neustadt P C, November 12, 1996: US05574983 (81 worldwide citation)

A base station and a mobile station in a mobile communication system capable of reducing interference among mobile stations and increasing a subscriber capacity of the system. The base station has a unit for measuring a measurement value for at least one of a receiving level and an interference rati ...


8
Mamoru Sawahashi, Narumi Umeda, Tomohiro Dohi, Koji Ohno: Transmission power control method and a communication system using the same. NTT Mobile Communications Network, Rogers & Wells, October 15, 1996: US05566165 (78 worldwide citation)

A transmission power control method for a CDMA system including the steps of calculating an actual SIR (Signal-to-Interference Ratio) of a desired signal; deciding whether the actual SIR is greater than a predetermined reference SIR which satisfies a predetermined conununication quality; forming a t ...


9
Junichirou Hagiwara, Kouichi Sawai, Shinji Uebayashi: Data transmission scheme with automatic repeat request. NTT Mobile Communications Network, Oblon Spivak McClelland Maier & Neustadt P C, May 13, 1997: US05629948 (75 worldwide citation)

An ARQ data transmission scheme in which the overhead due to the ARQ control data is reduced to resolve the problem of the throughput deterioration. The error correction code for the original data is used for each re-transmission block or sub-block, and the block or sub-block corresponding to each r ...


10
Narumi Umeda, Akihiro Higashi, Akira Hiroike, Akira Kaiyama: Method and system for CDMA mobile communication. NTT Mobile Communications Network, Oblon Spivak McClelland Maier & Neustadt P C, September 30, 1997: US05673260 (75 worldwide citation)

CDMA mobile communication method and system for realizing an autonomous distributed control of radio channel allocation, a synchronization control for a smooth establishment/switching, and a VOX control for a capacity increase are provided. At either one station of each base station and the mobile s ...